Best Open Source langchain Libraries

A curated list of the most popular GitHub repositories tagged with langchain. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1langchain-ai/langchain

🦜🔗 The platform for reliable agents.

127,110Python

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#2microsoft/markitdown

Python tool for converting files and office documents to Markdown.

87,461Python

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#3FlowiseAI/Flowise

Build AI Agents, Visually

49,249TypeScript

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#4chatchat-space/Langchain-Chatchat

Langchain-Chatchat（原Langchain-ChatGLM）基于 Langchain 与 ChatGLM, Qwen 与 Llama 等语言模型的 RAG 与 Agent 应用 | Langchain-Chatchat (formerly langchain-ChatGLM), local knowledge based LLM (like ChatGLM, Qwen and Llama) RAG and Agent app with langchain

37,306Python

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#5BerriAI/litellm

Python SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI (or native) format, with cost tracking, guardrails, loadbalancing and logging. [Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM]

36,503Python

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#6reworkd/AgentGPT

🤖 Assemble, configure, and deploy autonomous AI Agents in your browser.

35,717TypeScript

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#7NirDiamant/RAG_Techniques

This repository showcases various advanced techniques for Retrieval-Augmented Generation (RAG) systems. RAG systems combine information retrieval with generative models to provide accurate and contextually rich responses.

25,520Jupyter Notebook

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#8huggingface/agents-course

This repository contains the Hugging Face Agents Course.

25,466MDX

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#9langchain-ai/langgraph

Build resilient language agents as graphs.

24,913Python

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#10mlflow/mlflow

The open source developer platform to build AI agents and models with confidence. Enhance your AI applications with end-to-end tracking, observability, and evaluations, all in one integrated platform.

24,349Python

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#11langfuse/langfuse

🪢 Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

22,137TypeScript

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#121Panel-dev/MaxKB

🔥 MaxKB is an open-source platform for building enterprise-grade agents. 强大易用的开源企业级智能体平台。

20,146Python

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#13NirDiamant/GenAI_Agents

This repository provides tutorials and implementations for various Generative AI Agent techniques, from basic to advanced. It serves as a comprehensive guide for building intelligent, interactive AI systems.

20,075Jupyter Notebook

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#14bytedance/deer-flow

An open-source SuperAgent harness that researches, codes, and creates. With the help of sandboxes, memories, tools, skills and subagents, it handles different levels of tasks that could take minutes to hours.

20,047TypeScript

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#15meta-llama/llama-cookbook

Welcome to the Llama Cookbook! This is your go to guide for Building with Llama: Getting started with Inference, Fine-Tuning, RAG. We also show you how to solve end to end problems using Llama model family and using them on various provider services

18,209Jupyter Notebook

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#16comet-ml/opik

Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.

17,798Python

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#17botpress/botpress

The open-source hub to build & deploy GPT/LLM Agents ⚡️

14,558TypeScript

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#18Unstructured-IO/unstructured

Convert documents to structured data effortlessly. Unstructured is open-source ETL solution for transforming complex documents into clean, structured formats for language models. Visit our website to learn more about our enterprise grade Platform product for production grade workflows, partitioning, enrichments, chunking and embedding.

14,014HTML

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#19MODSetter/SurfSense

Connect any LLM to your internal knowledge sources and chat with it in real time alongside your team. OSS alternative to NotebookLM, Perplexity, and Glean. Join our Discord: https://discord.gg/ejRNvftDp9

13,002Python

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#20GoogleCloudPlatform/generative-ai

Sample code and notebooks for Generative AI on Google Cloud, with Gemini on Vertex AI

12,709Jupyter Notebook

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#21yichuan-w/LEANN

[MLsys2026]: RAG on Everything with LEANN. Enjoy 97% storage savings while running a fast, accurate, and 100% private RAG application on your personal device.

9,999Python

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#22cloudwego/eino

The ultimate LLM/AI application development framework in Go.

9,686Go

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#23langchain-ai/deepagents

Deep Agents is an agent harness built on langchain and langgraph. Deep Agents are equipped with a planning tool, a filesystem backend, and the ability to spawn subagents - making them well-equipped to handle complex agentic tasks.

9,457Python

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#24kyrolabs/awesome-langchain

😎 Awesome list of tools and projects with the awesome LangChain framework

9,174

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#25activeloopai/deeplake

Database for AI. Store Vectors, Images, Texts, Videos, etc. Use with LLMs/LangChain. Store, query, version, & visualize any AI data. Stream data in real-time to PyTorch/TensorFlow. https://activeloop.ai

9,008C++

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#26liaokongVFX/LangChain-Chinese-Getting-Started-Guide

LangChain 的中文入门教程

8,816

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#27tmc/langchaingo

LangChain for Go, the easiest way to write LLM-based programs in Go

8,679Go

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